> For the complete documentation index, see [llms.txt](https://docs.tensorx.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tensorx.ai/chat-interfaces/jan.md).

# Jan

[Jan](https://jan.ai/) is a privacy-focused, open-source ChatGPT alternative that runs locally. It supports connecting to cloud providers like TensorX through OpenAI-compatible configuration.

## Prerequisites

* Jan installed from [jan.ai](https://jan.ai/)
* TensorX API key from [app.tensorx.ai](https://app.tensorx.ai)

## Configuration

### Step 1: Open Settings

1. Click the **Settings** icon (⚙️) in the bottom-left corner of Jan
2. Navigate to **Model Providers** in the left sidebar

### Step 2: Configure OpenAI Provider

1. Select **OpenAI** from the Model Providers list
2. Enter your TensorX credentials:
   * **API Key**: Your TensorX API key
   * **API Base URL**: `https://api.tensorx.ai/v1`
3. Click **Save**

### Step 3: Add TensorX Models

Jan automatically includes popular OpenAI models. To add specific TensorX models:

1. Go to **Settings** > **Model Providers** > **OpenAI**
2. Add models by their exact ID:
   * `claude-sonnet-4-20250514`
   * `claude-3-5-sonnet-20241022`
   * `gpt-4o`
   * `gpt-4o-mini`

## Using Models in Chat

1. Open a new chat or existing thread
2. Click the model selector dropdown
3. Choose your configured TensorX model
4. Start chatting!

## Manual Model Configuration

For advanced users, you can manually add models via JSON configuration:

1. Navigate to Jan Data Folder:
   * **Mac**: `~/Library/Application Support/jan/models/`
   * **Windows**: `%APPDATA%\jan\models\`
   * **Linux**: `~/.config/jan/models/`
2. Create a new folder for your model (e.g., `tensorx-claude-sonnet`)
3. Create a `model.json` file:

```json
{
  "id": "claude-sonnet-4-20250514",
  "object": "model",
  "name": "Claude Sonnet 4 (TensorX)",
  "description": "Claude Sonnet 4 via TensorX API",
  "settings": {
    "ctx_len": 200000
  },
  "parameters": {
    "temperature": 0.7,
    "top_p": 0.95,
    "stream": true,
    "max_tokens": 4096
  },
  "metadata": {
    "author": "TensorX",
    "tags": ["Claude", "Anthropic", "TensorX"]
  },
  "engine": "openai"
}
```

## Available Models

See [TensorX Models](/api-reference/models.md) for the complete list.

Recommended models for Jan:

| Model                        | Best For                |
| ---------------------------- | ----------------------- |
| `claude-sonnet-4-20250514`   | Complex tasks, analysis |
| `claude-3-5-sonnet-20241022` | General chat, coding    |
| `gpt-4o`                     | Multi-modal, images     |
| `gpt-4o-mini`                | Fast, cost-effective    |

## Troubleshooting

### Model not connecting

1. Verify API key is entered correctly
2. Ensure base URL is `https://api.tensorx.ai/v1` (with `/v1`)
3. Check Jan's logs for error details

### Model unavailable

* Confirm the model ID matches exactly (case-sensitive)
* Verify your TensorX account has access to the model

### Slow responses

* Check your internet connection
* Try a faster model like `gpt-4o-mini`

## Resources

* [Jan Documentation](https://jan.ai/docs)
* [Jan GitHub](https://github.com/janhq/jan)
* [TensorX API Reference](/api-reference/overview.md)


---

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